Seleukid Kingdom. Antigonos I Monophthalmos. As Strategos of Asia, 320-306/5 BC. AR Tetradrachm (25mm, 16.59g). In the name and types of Alexander III. Babylon mint. Struck under Peithon, ca.315-311 BC. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; monogram in wreath in left field, KΛ below throne. Price 3713.